##' Lead-210 age-depth measurements for Small Water
##'
##' A dataset containing lead-210 based age depth measurements for the SMALL1
##' core from Small Water.
##'
##' The variables are as follows:
##'
##' * `Depth`
##' * `Drymass`
##' * `Date`
##' * `Age`
##' * `Error`
##' * `SedAccRate`
##' * `SedPerCentChange`
##'
##' @format A data frame with 12 rows and 7 variables.
##'
##' @source Simpson, G.L. (Unpublished data).
##'
##' @keywords data
##' @name smallAges
##' @docType data
NULL

##' Simulated bird migration data
##'
##' Data generated from a hypothetical study of bird movement along a migration
##' corridor, sampled throughout the year. This dataset consists of simulated
##' sample records of numbers of observed locations of 100 tagged individuals
##' each from six species of bird, at ten locations along a latitudinal gradient,
##' with one observation taken every four weeks. Counts were simulated randomly
##' for each species in each location and week by creating a species-specific
##' migration curve that gave the probability of finding an individual of a
##' given species in a given location, then simulated the distribution of
##' individuals across sites using a multinomial distribution, and subsampling
##' that using a binomial distribution to simulation observation error (i.e.
##' not every bird present at a location would be detected). The data set
##' (`bird_move`) consists of the variables `count`, `latitude`, `week` and
##' `species`.
##'
##' @source Pedersen EJ, Miller DL, Simpson GL, Ross N. 2018. Hierarchical
##'   generalized additive models: an introduction with mgcv. *PeerJ Preprints*
##'   **6**:e27320v1 \doi{10.7287/peerj.preprints.27320v1}.
##'
##' @format A data frame
##' @name bird_move
##' @keywords data
##' @docType data
NULL

##' Madison lakes zooplankton data
##'
##' The Madison lake zooplankton data are from a long-term study in seasonal
##' dynamics of zooplankton, collected by the Richard Lathrop. The data were
##' collected from a chain of lakes in Wisconsin (Mendota, Monona, Kegnonsa,
##' and Waubesa) approximately bi-weekly from 1976 to 1994. They consist of
##' samples of the zooplankton communities, taken from the deepest point of each
##' lake via vertical tow. The data are provided by the Wisconsin Department of
##' Natural Resources and their collection and processing are fully described in
##' Lathrop (2000).
##'
##' Each record consists of counts of a given zooplankton taxon taken from a
##' subsample from a single vertical net tow, which was then scaled to account
##' for the relative volume of subsample versus the whole net sample and the area
##' of the net tow and rounded to the nearest 1000 to give estimated population
##' density per m2 for each taxon at each point in time in each sampled lake.
##'
##' @source Pedersen EJ, Miller DL, Simpson GL, Ross N. 2018. Hierarchical
##'   generalized additive models: an introduction with mgcv. *PeerJ Preprints*
##'   **6**:e27320v1 \doi{10.7287/peerj.preprints.27320v1}.
##'
##' @references Lathrop RC. (2000). Madison Wisonsin Lakes Zooplankton 1976--1994.
##'   Environmental Data Initiative.
##'
##' @format A data frame
##' @name zooplankton
##' @keywords data
##' @docType data
NULL

##' Data from the General Social Survey (GSS) from the National Opinion Research
##' Center of the University of Chicago
##'
##' A subset of the data from the `carData::GSSvocab` dataset from the
##' `carData` package, containing observations from 2016 only.
##'
##' @format A data frame with 1858 rows and 3 variables:
##'   * `vocab`: numeric; the number of words out of 10 correct on a vocabulary
##'     test.
##'   * `nativeBorn`: factor; Was the respondent born in the US? A factor with
##'     levels `no` and `yes`.
##'   * `ageGroup`: factor; grouped age of the respondent with levels `18-29`
##'       `30-39`, `40-49`, `50-59`, and `60+`.##' 
##'
##' @keywords data
##' @name gss_vocab
##' @docType data
NULL

##' Reference simulation data
##'
##' A set of reference objects for testing [data_sim()].
##'
##' @format A named list of simulated data sets created by [data_sim()].
##'
##' @keywords data
##' @name ref_sims
##' @docType data
NULL

